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fixed mechanism of detection selection from table wich we update

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(BUG##9398, BUG#8703)
fixed wrong join view detection in multi-delete which lead to server crash
This commit is contained in:
bell@sanja.is.com.ua
2005-03-28 15:13:31 +03:00
parent eeeedd31b9
commit 1659dacab1
15 changed files with 561 additions and 165 deletions
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73
sql/sql_lex.cc
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@ -1112,7 +1112,7 @@ void st_select_lex::init_query()
first_execution= 1;
first_cond_optimization= 1;
parsing_place= NO_MATTER;
no_wrap_view_item= 0;
exclude_from_table_unique_test= no_wrap_view_item= FALSE;
link_next= 0;
}
@ -1493,77 +1493,6 @@ bool st_select_lex::setup_ref_array(THD *thd, uint order_group_num)
}
/*
Find db.table which will be updated in this unit
SYNOPSIS
st_select_lex_unit::check_updateable()
db - data base name
table - real table name
RETURN
1 - found
0 - OK (table did not found)
*/
bool st_select_lex_unit::check_updateable(char *db, char *table)
{
for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())
if (sl->check_updateable(db, table))
return 1;
return 0;
}
/*
Find db.table which will be updated in this select and
underlying ones (except derived tables)
SYNOPSIS
st_select_lex::check_updateable()
db - data base name
table - real table name
RETURN
1 - found
0 - OK (table did not found)
*/
bool st_select_lex::check_updateable(char *db, char *table)
{
if (find_table_in_local_list(get_table_list(), db, table))
return 1;
return check_updateable_in_subqueries(db, table);
}
/*
Find db.table which will be updated in underlying subqueries
SYNOPSIS
st_select_lex::check_updateable_in_subqueries()
db - data base name
table - real table name
RETURN
1 - found
0 - OK (table did not found)
*/
bool st_select_lex::check_updateable_in_subqueries(char *db, char *table)
{
for (SELECT_LEX_UNIT *un= first_inner_unit();
un;
un= un->next_unit())
{
if (un->first_select()->linkage != DERIVED_TABLE_TYPE &&
un->check_updateable(db, table))
return 1;
}
return 0;
}
void st_select_lex_unit::print(String *str)
{
for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())